The word "Homeric" is an adjective that relates to Homer, an ancient Greek poet famous for writing epic poems like the "Iliad" and the "Odyssey." When we say something is "Homeric," we mean it has qualities or characteristics that are similar to the works of Homer or the time he lived in.
While "Homeric" itself doesn't have idioms or phrasal verbs directly associated with it, you might encounter phrases like "Homeric journey," which refers to a long and adventurous journey, reminiscent of the travels of Odysseus in the "Odyssey."
"Homeric" is a descriptive word for things that are grand and heroic, inspired by the epic tales of Homer.